trim A
A hyperplane arrangement is simple if none of its linear forms is identically $0$ and no hyperplane is cut out out by more than one form. This method returns a simple arrangement by reducing the multiplicities of the hyperplanes and eliminating the zero equation (if necessary).
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Some natural operations produce non-simple hyperplane arrangements.
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The source of this document is in /build/reproducible-path/macaulay2-1.25.06+ds/M2/Macaulay2/packages/HyperplaneArrangements.m2:1699:0.